Which file opening mode ensures that output is written at the end of a file?
Options
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A.
ios::in
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B.
ios::trunc
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C.
ios::app
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D.
More than one of the above
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E.
None of the above
Correct Answer (Detailed Explanation is Below)
C.
ios::app
Detailed Explanation
Correct Answer: Option CExplanation:ios::app opens a file in append mode. Every write operation takes place at the end of the file, preserving the existing contents.